One vertex per element, one color per generator, with an edge from x to x·s.
(2,4)(5,6,10,14)(7,13,9,11)(8,12,18,16)(15,20,17,19)(21,22,26,30)(23,31,34,27)(24,28,25,29)(32,36,33,35)(1,2)(3,4)(21,22,26,30)(23,27,34,31)(24,28,25,29)(32,35,33,36)(5,7,10,9)(6,11,14,13)(8,15,18,17)(12,19,16,20)(21,22)(23,27)(24,28)(25,29)(26,30)(31,34)(32,35)(33,36)(5,6)(7,11)(8,16)(9,13)(10,14)(12,18)(15,20)(17,19)(21,23)(22,27)(24,32)(25,33)(26,34)(28,35)(29,36)(30,31) involution — undirected(5,8)(6,12)(7,15)(9,17)(10,18)(11,19)(13,20)(14,16)(21,24,26,25)(22,28,30,29)(23,32,34,33)(27,35,31,36)(5,9,10,7)(6,13,14,11)(8,17,18,15)(12,20,16,19)(21,25,26,24)(22,29,30,28)(23,33,34,32)(27,36,31,35)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.